Error:
K3AsS3 %2B HNO3 %3D K3AsO4 %2B H2SO4 %2B NO %2B H2O
^Unexpected character ('%')K3AsS3 %2B HNO3 %3D K3AsO4 %2B H2SO4 %2B NO %2B H2O
^Unexpected character ('%')